Pivot for pivoting window

ABSTRACT

MOVEMENT ABOUT THE DISENGAGED PIN WHILE PREVENTING PIVOTAL MOVEMENT ABOUT THE ENGAGED PIN.   A PIVOT FOR A PIVOTING CASEMENT WINDOW HAS TWO PINS ABOUT WHICH THE CASEMENT IS PIVOTED IN SUCCESSION, FIRST ABOUT THE FIRST PIN TO FREE THE CASEMENT FROM THE POST TO PIVOT THROUGH A DETERMINED ANGLE FOR VENTILATION UP TO 90* AND THEN ABOUT THE SECOND PIN UNTIL THE CASEMENT HAS PIVOTED THROUGH 180*. THE PIVOT HAS A SLIDING BOLT WHICH IS CONCEALED IN AN INTERMEDIATE PIECE BETWEEN THE CASEMENT AND POST, THE PINS BEING MOUNTED IN BORES IN THE INTERMEDIATE PIECE AND HAVING NOTCHES IN THE SURFACES THEREOF. THE BOLT SLIDES IN A CAVITY BETWEEN THE BORES AND CAN ENGAGE IN THE NOTCH OF ONE OR THE OTHER PINS TO SECURE SUCH PIN TO THE INTERMEDIATE PIECE AND PERMIT PIVOTAL

Jan. 5, 1971 2 Sheets-Sheet 1 Filed 001;. 7. 1968 F/GJ' RaRuERs PIVOT FOR PIVOTING WINDOW Jan. 5, 1971 Filed 00t- 'I, 1968 2 Sheets-Sheet 2 F 6 3 US. Cl. 16163 12 Claims ABSTRACT OF THE DISCLOSURE A pivot for a pivoting casement window has two pins about which the easement is pivoted in succession, first about the first pin to free the casement from the post to pivot through a determined angle for ventilation up to 90 and then about the second pin until the casement has pivoted through 180. The pivot has a sliding bolt which is concealed in an intermediate piece between the casement and post, the pins being mounted in bores in the intermediate piece and having notches in the surfaces thereof. The bolt slides in a cavity between the bores and can engage in the notch of one or the other pins to secure such pin to the intermediate piece and permit pivotal movement about the disengaged pin while preventing pivotal movement about the engaged pin.

This invention relates to a pivot for pivoting windows, of the type comprising two pins about which the pivoting of the casement is effected in succession, firstly about the first pin in order to free the easement from the window post and to pivot it through a determined angle, for example in order to bring it into the ventilation position, or through a greater angle which may be as large as 90, and then about the second pin until the casement has pivoted through 180.

The pivot according to the invention is distinguished from known pivots by an extremely simple construction which requires only a very small number of different parts, all of which are easy to machine. In addition, it has all the desirable features, and in particular makes incorrect operation in the handling of the casement impossible; it is received completely in the metal frames of the window post and casement, or has only the usual small projecting part when it is used for wooden frames. In addition, the pivoting movements of the casement are subjected to the action of braking means which do not get out of order even in the course of a long period of time and which make it possible to secure the fixed casement in any open position.

According to the invention the pivot comprises a sliding bolt which is hidden from the inside, inaccessible from the outside, and capable of locking the pivoting about the second pin while pivoting is effected about the first pin, and of blocking pivoting about the first pin while pivoting takes place about the second pin.

The pivoting pins provided in the pivot consist of two preferably identical pivot-pins having in their cylindrical face a notch disposed on a generatrix. One of the pivotpins is secured to a plate fixed on the post and the other pin is secured to a plate fixed on the casement. The two pivot-pins are inserted in bores in an intermediate part which is placed between the two plates and which, be tween the bores, has a cavity in which there is adapted to slide a bolt which is able to be engaged in the notch in one or the other of the pivot-pins, thus securing the pin in question to the intermediate piece.

In a first embodiment of the invention, the bolt is advantageously composed of two lock bolts having inverted nited States Patent ice chamfers and of a spring placed between the lock bolts and holding them apart. The notches in the pivot-pins have the shape of a recumbent V, in which one of the lock bolts is adapted to engage for the purpose of them preventing a rotary movement between the intermediate piece and one of the plates when this movement is made in one direction, and, when the movement is made in the other direction, applying by the oblique face of the notch a pressure against the chamfered face of the lock bolt, which causes the latter to pass out of the notch and to slide by its edge over the cylindrical surface of the lock bolt during the remainder of the movement, one of the lock bolts being engaged in its notch when the other lock bolt is disengaged from its notch.

The intermediate piece is in one piece and has at each end, between the latter and' the pivot-pin bore, a radial slot and a bore disposed transversely to said slot and partly threaded. a screw intended to grip the pivot-pin in its bore is received in said partly threaded bore in order to constitute two brakes making it possible to hold the casement securely in any pivoted position.

In another embodiment, the intermediate piece is composed of two parts disposed on each side of the plane passing through the pivot-pins and connected together by a single screw which passes through the two parts and makes it possible for them to be gripped against the pivotpins, so as to constitute a friction brake for each of said 131118.

This single screw may pass through the two parts of the intermediate piece at equal distances from the pivotpins, but the distance from the first pivot-pin is advantageously slightly shorter than that from the second pivot-pin, in order to apply to the first pivot-pin a greater braking action than that applied to the second pivot-pin.

The pivot-pins are each provided with a V-shaped notch on a generatrix, symmetrical to an axial plane, the two faces of the V-shaped notch enclosing substantially a right-angle.

The bolt is in one piece and has a double symmetrical bevel at each end and a central buttonhole permitting the passage of the screw connecting the two parts of the intermediate piece. The length of the bolt between the edges of the double bevels is selected so that one of the double bevels is engaged in the notch in one of the pivotpins and that the edge of the other double bevel slides over the face of the other pivot-pin. Thus on releasing the casement from the post, the intermediate piece is secured to the second pivot pin through the engagement of the bolt in the latter, while pivoting is effected about the first pivot-pin; the bolt can then slide to the end of this first pivoting movement and is forced to engage in the first pivot-pin at the beginning of the pivoting about the second pivot-pin, thus securing the first pivot-pin to the intermediate piece during the pivoting about the second pivot pin.

The pivot-pins and also their bores in the intermediate piece are preferably slightly conical, The pivot-pins are fixed in their respective plates on the side of their small diameter, and a thin washer is inserted between the pivotpin and the plate in order to avoid direct contact between the intermediate piece and the plate.

In another embodiment of the invention the pivot-pins are biconical or curved and the bores in the intermediate piece have a corresponding surface. In this manner direct contact between the intermediate piece and the plates is avoided without washers being inserted.

It has already been proposed to provide a sliding bolt in a pivot having two pivot-pins coming into action successively, for the purpose of preventing the displacement of the first pin after the pivoting about the latter, said bolt obligatorily intervening on the subsequent pivoting about the second pin. Before it is possible to start the pivoting about the second pin, it was necessary to withdraw the bolt by hand in order to free the first pin, whereas in the case of the present invention this bolt automatically secures the intermediate piece to the plate of the casement during pivoting about the first pin and secures it to the plate of the post during pivoting about the second pin.

The principle of braking by tightening a bearing having a radial slot about a pivot is also known. Nevertheless, it was necessary to provide the brake with special parts coming into action only for the purpose of braking, whereas in the present invention identical brakes for the two pivot pins are provided by a part which already serves other functions, by means of slots provided in said part and of a gripping screw passing through said slots.

The accompanying drawing illustrates by way of eX- ample a number of embodiments of the invention.

FIGS. 1 and 2 are views in perspective, taken from a point situated outside the Window, of a pivot intended to be mounted in metal window frames;

FIG. 1 is an exploded view of a window pivot in the position in which the casement has been pivoted through FIG. 2 shows the same pivot at the commencement of the pivoting of the casement in order to open the window;

FIGS. 3 to show different forms of construction of a pivot intended for mounting in wooden frames, the difference between pivots for metal frames and those for wooden frames being known and not forming part of the invention;

FIG. 3 is a front view of a left-hand pivot, the plate of the casement being turned through 180 in relation to that of the post;

FIG. 4 is a section along the line IIII in FIG. 1, and

FIG. 5 is a section corresponding to FIG. 2 of a slightly modified pivot.

A pivot-pin 2 is fixed in the plate 1 (FIG. 1) mounted in the post frame, and is engaged in the bore 3 in an intermediate piece 4, while to the plate 5, mounted in the frame of the casement htere is fixed, by means of screws 6 (which is also the case where the pivot-pin 2 is concerned), a pivot-pin 7 engaging in the bore 8 in the intermediate piece 4.

The intermediate piece 4 contains an internal passage 9 of rectangular section which passes right through it and in which, between the pivot-pins 2 and 7, there is received a sliding bolt composed of two lock bolts 10 and 11 having inverted chamfers and a coil spring 12 holding the lock bolts apart from one another.

Each of the pivot-pins 2 and 7 has a notch 13 in the form of a recumbent V and matching the shape of the lock bolts. These notches are so disposed that when one of the lock bolts is engaged in its notch, the other lock bolt is released from its notch and its edge slides over the cylindrical face of the pivot-pin.

The piece 4 is also provided with radial slots 14 extending from its ends to the adjacent bores, thus enabling the pivot-pins to be secured in their bores by means of screws 15 passing through the intermediate piece in partly threaded bores 16 in order 0t provide a means of braking the pivot-pins which will not get out of order during use.

When the window is closed, the outer faces and the bottom faces of the plates 1 and 5 and of the intermediate piece 4 are in parallel planes, the pivot then having the shape of a parallelepiped which is received completely in the frames of the casement and of the post. When the casement is freed from the post (FIG. 2), the lock bolt 11 is engaged in the notch 13 of the pivot-pin 7, which has the consequence that the plate 5 of the easement and the intermediate piece 4 turn together about the pivot-pin 2 (first axis of pivoting). When the intermediate piece 4 and the plate 5 have reached the desired angle, which is 90 in the present case, the lock bolt 10 engages in the 4 notch 13 in the pivot-pin 2 and prevents the continuation of the pivoting movement of the intermediate piece 4 about the pin 2. The continuation of the pivoting movement of the plate 5 has the result that the lock bolt 11 is freed from the notch 13 of the pivot-pin 7, thus permitting pivoting about the latter (second axis of pivoting), while piv-- oting about the pivot-pin 2 is prevented.

When the casement has been turned through 180, it is possible to remove it from the frame, for example in order to replace a panel of glass. For this purpose it is sufficient to undo the screws 6 fastening the pivot-pin 7 to the plate 5. The casement is then supported solely by radial ribs (not illustrated) on each pivot-pin 7 of the left-hand and right-hand pivots, said ribs being engaged in grooves 17 (FIG. 1), the groove in the plate 5 being extended to the end of the latter, and the casement can be removed by pushing it upwards, the pivot-pin 7 remaining in its bore 8.

In the return movement for the purpose of closing the casement, only pivoting about the pivot-pin 7 is permitted until the plate 5 reaches the horizontal position, whereupon said plate and the intermediate piece 4 are locked together and the pivoting movement about the pivot-pin 2 is made possible.

In the embodiments illustrated in FIGS. 3 to 5, the plate 1 is mounted as previously in the frame of the post, and has fixed on it a pivot-pin 2 engaging in the bore 3 in an intermediate piece 4. The plate 5 is mounted in the frame of the casement and carries a pivot-pin 7 which (like the pivot-pin 2) is fixed by screws 6. This pivot-pin 7 engages in the bore 8 in the intermediate piece 4.

In these embodiments, the intermediate piece 4 comprises the parts 18 and 19 which are connected together by a single screw 20 enabling said parts to be gripped against the pivot-pins 2 and 7 for the purpose of braking the pivoting of the intermediate piece 4 about the pivotpins. If it is desired to brake the pivoting about the pivotpin 2 more than that about the pivot-pin 7, so that the casement will stop in any position during the first pivoting, which takes place about the pivot-pin 2 in order to free the casement from the post and to hold it in a ventilation position, a bore is provided which passes through the parts 18 and 19 and is intended to receive the screw 20 slightly nearer the bore 3 than the bore 8, instead of situatlng it in an equidistant position between said bores.

The pivot-pins 2 and 7 are provided with a V-shaped notch 21 disposed symmetrically in relation to an axial plane, the branches of which enclose an angle of about Although a single notch in each of the pivot-pins is sufiicient, they have another notch 21' (FIG. 3), in order to enable the same pivot-pin to be used indiscriminately on left-hand or right-hand pivots.

Between the parts 18 and 19 of the intermediate piece 4 there is adapted to slide a bolt 22 which is in one piece and at its ends is provided with symmetrical double bevels 23, and also with a buttonhole 24 which is situated in the central portion and through which the screw 20 passes. The bolt is guided laterally on the one hand by the plates 1 and 5 and on the other hand by the screw 20, so that it is not necessary to provide grooves in the parts 18 and 19 in order to guide it.

Instead of being cylindrical, the pivot-pins 2 and 7 and the bores 3 and 8 are advantageously slightly conical (FIGS. 3 and 4) and the pivot-pins are fixed at their smaller diameter end on the plate 1 or 5. A thin steel washer 25 is placed between the pivot-pin and the plate and partly embeded in the parts 18 and 19 of the intermediate piece 4, in order to prevent direct contact between the latter and the plates 1 and 5.

In an alternative, which is illustrated in FIG. 5, the pivot-pins are biconical or curved and the bores have a corresponding inside face, thus making it possible to avoid direct contact between the part 4 and the plates 1 and 5 without having to use washers 25.

As already stated, FIG. 3 shows the plate 5 inverted by 180 in relation to the plate 1. In this position, the outer face of the window is turned towards the inside for the purpose of cleaning. In this position, the intermediate piece 4 is secured to the plate 1 by the engagement of one of the double bevels 23 of the bolt 22 in the notch 21 in the pivot-pin 2, and the edge of the other double bevel slides over the face of the pivot-pin 7, thus making it impossible for the bolt to slide.

In order to close the window, a counterclockwise movement is imparted to the plate 5, and after a quarter-turn the notch 21 in the pivot-pin 7 is in the axis of the bolt 22, thus enabling the latter to slide. This sliding is effected at the beginning of the movement or rotation of the as sembly comprising the plate 5 and the intermediate piece 4 about the pivot-pin 2, obliging the bolt to move out of the notch in the pivot-pin 2 and to engage by its other end in the notch in the pivot-pin 7, thus locking the inter mediate piece 4 to the plate 5. The window is closed when the plate 5 is situated at the side of the plate 1 and the axis of the pivot-pin 7 is situated above that of the pivotpin 2. It will easily be realised that in order to open the window movement is effected about the pivot-pin 2, and that any movement about the pivot-pin 7 is prevented until the intermediate piece and the plate 5, which is secured to the latter, have reached the horizontal position, whereupon the bolt can slide in the opposite direction to that described above.

The invention is obviously not limited to the embodiments which have been described and illustrated by way of example, and modifications could be made thereto without departing from its scope.

I claim:

1. In a pivot for a pivoting casement window, having two pins about which the pivoting of the casement is effected in succession, first about the first pin for the purpose of freeing it from the post and pivoting it through a determined angle, for example in order to bring it into the ventilation position or through a greater angle which may be as large as 90, and then about the second pin until the easement has pivoted through 180, an improvement which comprises a sliding bolt which is concealed on the inside of the pivot so as to be inaccessible from the outside and capable of preventing pivoting about the second pin while pivoting is effected about the first pin and of preventing pivoting about the first pin when pivoting is effected about the second pin.

2. A pivot according to claim 1, wherein the pivoting pins comprise two pivot-pins each having a cylindrical face with a notch disposed along a generatrix thereof, one of the pivot-pins being secured to a plate which is fixed on the post and the other secured to a plate which is fixed on the easement, an intermediate piece placed between the plates, both pivot-pins being inserted in bores provided in said intermediate piece placed between the two plates, said intermediate piece having a cavity between the bores in which said bolt is adapted to slide and engage in the notch of one or the other of the pivot-pins and thus secure said pivot-pin to the intermediate piece.

3. A pivot according to claim 2, wherein the bolt is constituted by two lock bolts having inverted chamfers, and a spring situated between the lock bolts and holding the latter apart.

4. A pivot according to claim 3 wherein the notches in the pivot-pins have the shape of a recumbent V, in which one of the lock bolts can engage for the purpose of then preventing rotation between the intermediate piece and one of the plates in one direction, and, if made in the other direction, applying through the oblique face of the notch a pressure to the chamfered face of the lock bolt, thus moving the latter out of the notch and causing it to slide by its edge over the cylindrical surface of the pivot-pin during the remainder of the movement, one of the lock bolts being engaged in its notch when the other is not engaged in its notch.

5. A pivot according to the claim 4 wherein the intermediate piece is in one piece and at each end, between the latter and the bore for a pivot-pin, is provided with a radial slot and a bore which is transversal to said slot and partly threaded, said partly threaded bore receiving a screw intended to grip the pivot-pin in the bore in order to constitute two brakes making it possible to hold the casement in any pivoting position.

6. A pivot according to claim 1, comprising an intermediate piece between the post and casement and provided with bores for the pivot-pins forming the pivoting axes, said intermediate piece being constituted of two parts disposed on each side of the plane passing through said axes, and a single screw connecting said parts together and passing through the two parts to grip them against the pivot-pins so as to form a friction brake for each of the pivot-pins.

7. A pivot according to claim 6, wherein the screw connecting the two parts of the intermediate piece passes through the latter at a shorter distance from the first pivot-pin than from the second pivot-pin, for applying to the first pivot-pin a greater braking action than that applied to the second pivot-pin.

8. A pivot according to claim 6, wherein the pivotpins are respectively provided with a V-shaped notch disposed on a generatrix, symmetrically to an axial plane.

9. A pivot according to claim 8, wherein each of the notches has two faces which enclose substantially a rightangle.

10. A pivot according to claim 6, wherein said bolt is in one piece and provided with a double symmetrical bevel at each end and with a central buttonhole permitting the passage of the screw connecting the two parts of the intermediate piece, the length of the bolt between the edges of the double bevels being selected so that one of the double bevels is engaged in the notch in one of the pivot-pins and the edge of the other double bevel slides over the face of the other pivot-pin, in such a manner that during the freeing of the casement from the post the intermediate piece is secured to the second pivot-pin through the engagement of the bolt in the latter while pivoting is effected about the first pivot-pin, and that at the end of this first pivoting the bolt is able to slide and is forced to engage in the first pivot-pin at the commencement of the pivoting about the second pivot-pin, the first pivot-pin being then secured to the intermediate piece during the pivoting about the second pivot-pin.

11. -A pivot according to claim 6, wherein the pivotpins and their bores in the intermediate piece are slightly conical, the pivot-pins being fixed on a respective plate at the end thereof where their diameter is smallest, with the interposition of a washer preventing direct contact between the intermediate piece and the plates.

12. A pivot according to claim 6, wherein the pivotpins are biconical or curved, the bores in the intermediate piece corresponding to the surface of the pivot-pins so as to prevent direct contact between the intermediate piece and the plates.

References Cited UNITED STATES PATENTS 3,099,036 7/1963 Bank 16-163 FOREIGN PATENTS 713,242 7/1965 Canada 16163 DONALD A. GRIFFIN, Primary Examiner U,S. C1.X.R. 

